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3 years ago

Find the volume of a cone with a height 7 and radius 7

Mathematics

1 answer:

qaws [65]3 years ago

6 0

Answer:

359.19

Step-by-step explanation:

Using the formula V=(πr^2) * h/3 and plugging in the given values we get 359.19.

I estimated pi at about 3.14

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Look at pic below please and figure out inverse tables

Sholpan [36]

Answer:

a -1

b 1

c 3

d 2

Step-by-step explanation:

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3 years ago

Reserved tickets for the football game cost $20 each and general admission tickets cost $12 each. The total ticket sales brought

Zarrin [17]

Answer:

number 4

Step-by-step explanation:

4 0

3 years ago

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Concert marketing: The college’s performing arts center wanted to investigate why ticket sales for the upcoming season significa

matrenka [14]

Answer:

Correct options are A,B,D:

The sample needs to be random, but we don't know if it is.

The actual count of community residents who received the concert brochure by mail is too small.

n(1 minus p‐hat) is not greater than 10.

Step-by-step explanation:

Concert marketing: The college’s performing arts center wanted to investigate why ticket sales for the upcoming season significantly decreased from last year’s sales. The marketing staff collected data from a survey of community residents. Out of the 110 people surveyed, only 7 received the concert brochure in the mail.

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4 years ago

Consider the function f(x)=x2e4x. f(x) has two inflection points at x = C and x = D with C≤D where C is and D is Finally for eac

fredd [130]

Answer:

the inflection points are

$x = -0.85, -0.14$

So,

$C = -0.85 \\D = -0.14$

It is concave down at the intervals

$(-\infty , -0.85] \cup [-0.14,\infty)$

And it would be concave up at

$(-0.85 , -0.14)$

Step-by-step explanation:

Remember that to find inflection points you need to find where

$f''(x) = 0$

Since

$f(x) = x^2 e^{4x}$

Then using the product and the chain rule you have that

$f'(x) = 2e^{4x} x(2x+1)$

And then, using again the chain rule and the product rule you have that

$f''(x) = 2e^{4x} (8x^2 +8x+1)$

Therefore you have to solve the equation

$8x^2 +8x+1 = 0$

Using the quadratic equation you get that there are two solutions, so the inflection points are

$x = -0.85, -0.14$

So,

$C = -0.85 \\D = -0.14$

Now remember that a function is concave up if the derivative is greater than zero and concave down if the derivative is less than zero. Therefor you have to solve these inequalties

$8x^2 +8x+1 < 0 \\8x^2 +8x+1 \geq 0$

And you would get that is concave down at the intervals

$(-\infty , -0.85] \cup [-0.14,\infty)$

And it would be concave up at

$(-0.85 , -0.14)$

8 0

3 years ago

Jim has 19{,}700\text { g}19,700 g19, comma, 700, start text, space, g, end text of sand in his sandbox. He brings home another

Aneli [31]

Answer:

26 kg

Step-by-step explanation:

Jim has 19,700 grams of sand.

He brings home another 6,300 grams from the beach.

Total Weight of Sand in his sandbox=19700+6300=26000 grams

However, we are required to find how many kilograms of sand Jim have in his sandbox now.

Now,

1000 grams = 1 kilogram

To convert from gram to kilogram, we divide by 1000.

26000 grams = $\frac{26000}{1000}$ kilograms =26 kg

Jim has 26 kilograms of sand in his sandbox.

6 0

3 years ago

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